package edu.pku.sei.transformation.editor.controller.editparts.node;

import java.beans.PropertyChangeEvent;

import org.eclipse.draw2d.ConnectionAnchor;
import org.eclipse.draw2d.EllipseAnchor;
import org.eclipse.draw2d.IFigure;
import org.eclipse.gef.ConnectionEditPart;
import org.eclipse.gef.EditPolicy;
import org.eclipse.gef.Request;
import org.eclipse.gef.editpolicies.DirectEditPolicy;

import edu.pku.sei.modeler.edit.parts.AbstractNodeEditPart;
import edu.pku.sei.modeler.model.common.MetaTypedList;
import edu.pku.sei.modeler.model.structure.MetaShapeElement;
import edu.pku.sei.transformation.editor.controller.policies.NodeComponentEditPolicy;
import edu.pku.sei.transformation.editor.controller.policies.TransformationNodeEditPolicy;
import edu.pku.sei.transformation.editor.model.ModelPackage;
import edu.pku.sei.transformation.editor.model.requirement.Description;
import edu.pku.sei.transformation.editor.model.requirement.TransformationGoal;
import edu.pku.sei.transformation.editor.views.figures.TransformationGoalFigure;

public class TransformationGoalEditpart extends AbstractNodeEditPart {

	public TransformationGoalEditpart(MetaShapeElement model) {
		super(model);
		// TODO Auto-generated constructor stub
	}

	@Override
	protected DirectEditPolicy createDirectEditPolicy() {
		// TODO Auto-generated method stub
		return null;
	}

	@Override
	protected IFigure createFigure() {
		TransformationGoal goal = (TransformationGoal) getNode().getModelElement();
		TransformationGoalFigure figure = new TransformationGoalFigure(goal.isOptional());
		figure.setName(goal.getName());
		return figure;
	}
	
	@Override
	protected void createEditPolicies() {
		super.createEditPolicies();
		installEditPolicy(EditPolicy.GRAPHICAL_NODE_ROLE,
				new TransformationNodeEditPolicy());
		installEditPolicy(EditPolicy.COMPONENT_ROLE,
				new NodeComponentEditPolicy());
	}
	
	public ConnectionAnchor getSourceConnectionAnchor(
			ConnectionEditPart connection) {
		if (anchor == null)
			anchor = new EllipseAnchor(getFigure());
		return anchor;
	}

	public ConnectionAnchor getSourceConnectionAnchor(Request request) {
		if (anchor == null)
			anchor = new EllipseAnchor(getFigure());
		return anchor;
	}

	public ConnectionAnchor getTargetConnectionAnchor(
			ConnectionEditPart connection) {
		if (anchor == null)
			anchor = new EllipseAnchor(getFigure());
		return anchor;
	}

	public ConnectionAnchor getTargetConnectionAnchor(Request request) {
		if (anchor == null)
			anchor = new EllipseAnchor(getFigure());
		return anchor;
	}
	
	@Override
	protected void handlePropertyChanged(PropertyChangeEvent event) {
		String propertyName = event.getPropertyName();
		TransformationGoalFigure figure = (TransformationGoalFigure) getFigure();
		TransformationGoal req = (TransformationGoal) getNode().getModelElement();
		if (ModelPackage.NAMEDELEMENT_NAME.equals(propertyName)) {
			figure.setName(event.getNewValue().toString());
		}  else if (ModelPackage.REQUIREMENT_END_DESCRIPTION.equals(propertyName)) {
			MetaTypedList list = (MetaTypedList)event.getOldValue();
			Description des = (Description)event.getNewValue();
			if (list.contains(des)) {
				figure.addDescrptions(des);
			} else {
				figure.removeDescription(des);
			}
		} else {
			super.handlePropertyChanged(event);			
		}
	}
	

}
